I'll nominate transfusion by Public Servent. I know he's spent a ton of time on this map, and I bet if you went asking him about how he made it he could go on for days telling you stories about it and it definitely shows. This map has some of the best symmetry I've ever seen on a non-foundry map. Some may argue the symmetry is so good that they have had problems determining where are they are on the map. I thought that being a pretty idiotic statement seeing as they are surrounded by a sky that's just wanting to be used as a guide. It's gameplay is remarkable when playing team and free for all, those players who are more observant usually come out with a higher score than others. Once again, great map.
Transfusion